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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-08 08:36:19 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2014-05-19 08:36:33 +0200 |
| commit | 214f0d9264f9b8c3b847a2ba2286c5ca5a33ab10 (patch) | |
| tree | 5db3b7224c0c2f7a26e0b730e2af8d1b80e33a09 /drivers/mfd | |
| parent | 85c29d2860f664e589dc3fd5d5478082de7c7e85 (diff) | |
| download | barebox-214f0d9264f9b8c3b847a2ba2286c5ca5a33ab10.tar.gz barebox-214f0d9264f9b8c3b847a2ba2286c5ca5a33ab10.tar.xz | |
mfd: mc13xxx: Allow to set callback for mc13xxx
Some boards have to initialize the PMIC before other devices can
be initialized. This requires three levels of initcalls: one level
in which the PMIC is probed, one in which the board can call mc13xxx_get()
and the third one to initialize the PMIC dependent devices.
Allow to register a callback which is called once the PMIC is initialized.
This way mc13xxx_get() is no longer necessary and the number of required
initcalls levels is reduced to two.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'drivers/mfd')
| -rw-r--r-- | drivers/mfd/mc13xxx.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/mfd/mc13xxx.c b/drivers/mfd/mc13xxx.c index bfbd328323..eabd5c4724 100644 --- a/drivers/mfd/mc13xxx.c +++ b/drivers/mfd/mc13xxx.c @@ -60,6 +60,21 @@ int mc13xxx_revision(struct mc13xxx *mc13xxx) } EXPORT_SYMBOL(mc13xxx_revision); +static void(*mc13xxx_init_callback)(struct mc13xxx *mc13xxx); + +int mc13xxx_register_init_callback(void(*callback)(struct mc13xxx *mc13xxx)) +{ + if (mc13xxx_init_callback) + return -EBUSY; + + mc13xxx_init_callback = callback; + + if (mc_dev) + mc13xxx_init_callback(mc_dev); + + return 0; +} + #ifdef CONFIG_SPI static int spi_rw(struct spi_device *spi, void * buf, size_t len) { @@ -350,6 +365,9 @@ static int __init mc13xxx_probe(struct device_d *dev) mc_dev->revision = rev; devfs_create(&mc_dev->cdev); + if (mc13xxx_init_callback) + mc13xxx_init_callback(mc_dev); + return 0; } |